Filter funnel



FIG. 1 is a perspective view of a filter funnel embodying our new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof; the rear view being a mirror image thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevational view thereof; and,

FIG. 7 is an exploded perspective view thereof, the filter shown in broken lines for illustrative purposes only and forming no part of the claimed design. 

The ornamental design for a filter funnel, as shown and described. 